What it does:
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SSTV is a radio amateurs transmission mode for pictures mostly used on
shortwave. This program reads a picture via datatypes and calculates the
SSTV-noise for that image. The SSTV-noise is transmitted via the audio device.
You can directly send the sound via radio or telephone.
The mode currently supported by af_mksstv is Martin M1. This is the most often
used mode here in europe.
usage:
af_mksstv picturefile
A transmission in Martin M1 mode takes 114 seconds.
The most critical part of SSTV is the exact timing. To solve this problem the
audio-device is used. For this reason af_mksstv does not work on a draco and
should not be used under UAE. The timing of
af_mksstv is very accurate, so it can be used to calibrate other SSTV receivers.
Tested:
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af_mksstv has succesfully tested on a plain C=A12000 and a
High-End-C=A4000T(060/50/604e/200) Both were PAL machines.
Plain A500 or A2000 are to slow for the current implentation.
I had no chance to test the program (the timing) on a NTSC Amiga.
possible future enhancements
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- Support other modes such as Scotty or Robot
- Support slower machines (7 MHz, 68000)
- Add a GUI
- Add a SSTV receiver
- Write a better documentation
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The implementation of such enhancements depends on your response! Tell me what
you think and what you want. Only then there is a chance for updates.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thanks:
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Thanks go to Martin Emmerson, the inventor of the Martin modes.
Visit his page at http://www.fortunecity.com/meltingpot/skipjunction/753/
for his latest SSTV developements.
Kind regards
selco
Alexander Fritsch